Perhaps you should try some spelling variations:
thieu khang » thieu quang
chieu khong » chien chong, chu khong, chieu duong
nhung cong » dung cong, thong cong, hang cong
tang cua » mang cua, tang luan, thong cua
hang cua » mang cua, hang ca, huong cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu khang) or (chieu khong)) - anh ((tang cua) OR (hang cua)) nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (chieu khong)) - anh ((tang cua) OR (hang cua)) nhung cong tac toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (chieu khong)) - anh ((tang cua) OR (hang cua)) nhung cong tac toan cao*".